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How to build 18W + 18W Stereo Hi-Fi Audio Amplifier (TDA2030)
August 6, 2010 - category: Audio amplifierDescription
2 x 18W Hi-Fi Stereo Power Amplifier based around two TDA2030 ICs. It has good input sensitivity, low distortion, good operating stability and full protection against overloads and output short-circuits. It can be used as a booster amplifier for existing small systems or to drive a second pair of speakers besides the ones already connected to the system. The board needs a symmetrical power supply of ±18Vdc/3A and can be connected to loads of 8 or 4 Ohm. Large heat sink is required for this circuit. Diagram shown below indicates only left channel. Make two circuits for for stereo version.
Picture of the project:
Circuit Diagram:
Parts:
- R1 = 22K
- R2 = 680R
- R3 = 22K
- R4 = 1R-1w
- D1 = 1N4001
- D2 = 1N4001
- C1 = 1uf-25V
- C2 = 22uF-25V
- C3 = 100nF-63V
- C4 = 100nF-63V
- C5 = 100uF-25V
- C6 = 100uF-25V
- C7 = 220nF-63V
- IC = TDA2030
If it does not work:
- Check your work for possible dry joints, bridges across adjacent tracks or soldering flux residues that usually cause problems.
- Check again all the external connections to and from the circuit to see if there is a mistake there.
- See that there are no components missing or inserted in the wrong places.
- Make sure that all the polarized components have been soldered the right way round.
- Make sure the supply has the correct voltage and is connected the right way round to your circuit.
- Check your project for faulty or damaged components.
Technical Specifications:
- Supply voltage = ±18Vdc/3A symmetrical (see text)
- Current consumption = 3A maximum
- Input impedance = 500K Ohms
- Input sensitivity = 250 mV
- Signal to noise ratio = 80 dB
- Frequency response = 20 - 20,000 Hz ± 1 dB
- Distortion = 0.5 % maximum
- Load impedance = 4 - 8 ohm
circuit from http://www.extremecircuits.net/2010/01/18w-18w-stereo-hi-fi-audio-amplifier.html
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